Guide saddle for rock drills



Patented July 28, 193,6

PATENT# GFFICE 2,048,157 GUIDE SADDLE non nook Damas William A. Smith, Sr., Athens, Pa., assign'or to Ingersoll-Rand Company, Jersey City N. J.. a corporation of New Jersey 1 Application september 1s, 1934, seriaiNo.' 144,640

4 Claims.

This invention relates to rock dri/11s, and more particularly to a guide saddle for rock drills of the type which are mounted slidably in supporting shells whereby they are held in correct rela- 5 tionship with respect to the work.

One object of the invention is to `reduce the expense of maintenance of rock drills of this type to a minimum by providing the rock drill with detachable guide ribs which may be replaced when reduced to a state of unserviceability through wear without necessitating the addi-l tional expense of replacing a comparatively costly casing part, and another object is Vto equip the rock drill with a guide saddle that will remain 15. secured rigidly in the assembled position on the rock drill and which may be conveniently and expeditiously attached to,the rock drill.

Other objects will be in part obvious and in accordance .with the practice of the invention and showing it applied to a rock drill,

Figures 2 and 3 are transverse views taken through Fgurel on the lines 2-2 and 3 3, re-

Figure 4 is a perspective view of the guide saddle.

Referring more particularly to the drawing, 2li designates the guide saddle. and 2l a. rock drill to which the guide saddle is applied.

The rock-drill 2|, oi.'` which only the casing parts are shown for the sake of simplicity of illustration, comprises a cylinder 22 andfront and back heads 23l and 2H, respectively,` which are secured to the cylinder by a pair of side rods 25 disposed onf opposite sides rof the rock drill in the usual manner.I The side rods 2 5- extend vthrough lugs 23 on the front head 23 A and through apertures 21 in a ange 28 carried by the back head 25. pOn thevcylinder 22 are the usual lugs 29 which are' spaced with respect to each slot 30 for theaccommodation other to provide a of the side rods.

The guide saddle 20, constructed in accordance with the vpractice of the invention, comprises a beam 3| which,` in the assembled positibnpf 'the saddle, lies beneath the rock drill and extends longitudinally thereof. On the oppositesides of the beam 3l are ribs 32 to extend, slidably, into the guideways of a shell (not shown) but which wmaybeofawellknownytypecommonly em-V (Cl. Z-45) ployed for guiding and maintaining the rock drill in the correct relationship with respect to the rock being drilled.

On the front end of the beam and forming an integral part thereof, is a sleeve 33 which em- 5 braces a reduced portion 34 constituting the front extremity of the cylinder 22- 'I'he front end 35 of the sleeve serves, in the, present instance, as an abutmentfor the rear end of the front head 23, and the rear end 36 of the sleeve 10 abuts a shoulder 31 on the cylinder 22. Thus, when the side rods 25 are manipulated to secure. the casing parts of the rock drilltogether the sleeve 33 will be clamped rigidly'between the 'front head Y23 and the shoulder 31.

Beneath the beam 3| and at the rear end thereof is a lug 38 which is bored to receive a feed nut 39. The interior of the feed nut 39 may be suitably threaded for engagement with the threads of the feed screw 40 whereby the rock 20 drill is actuated longitudinally of the supporting shell. The feed nut may be held against rotary movement within the lug 38 in any suitable manner. It has a head 4I which seats against the front end of the lug 38 and a nut Misas' .threaded to the rear end of the feed nut to secure the feed nut against longitudinal movement with respect to the lug 38.

Means are provided for preventing relative lateral movement between the rear ends of the 30 rock drill and the guide saddle .and alsdto prevent relative rotary movement between the two. To` this end the saddle is provided with a pair of laterally extending lugs d3 adjacent. its rear lextremity and the rearward surfaces M of the lugs 35 areush with the corresponding surface of the cylinder. The lugs B3- areprovided with apertures 45 wherein are arranged pins 46- that ex tend into apertures 41 in the flange 28. f The pins Gare preferably press-fitted into either the lugs -43 or the ange 28 andhave a sliding iit into the registering apertures-- of the other member.

In assembling the saddle on theV rock drill'the reduced portion 34 of the `cylinder 22 is first entered into the sleeve 33. and the back head 24 is thereafter seated against the rear end of the cylinder in position to bring the apertures 45 and 41 to register with each other so that the pins 45 will be seated in both. The side bolts 25 may then be. tightened to clamp all the casing 'parts 50 of the rock drill rmly together and also to clamp the rock drill securely to the guide saddle.

I claim:

l. A'guide saddle for rock drills, comprising in combination with a drill casing. side rods to hold 55 Iing side rods to hold them in alignment, a beam having guide ribs, a sleeve on one end of the beam tc embrace the cylinder independently o! the side rods, lugs on the other end of the saddle, and pins in the lugs and the back head to prevent relative rotary movement between the saddle and the cylinder.

3. In combination with'a rock drill having its casing parts held in alignment by side rods, a guide saddle comprising a beam seating with one end against a casing part and having longitudinal guide ribs, means integral with the beam adapted to embrace a reduced portion of the rock drill casing without engagement with the side rods and seating with its ends against certain of Jthe casing parts, and means at' another part of the beam to engage the rock drill to prevent relative rotary movement thereof.

4. In combination with a rock drill having its casing parts held in alignment by side rods,4 a. guide saddle comprising a beam seating with one end against a casing part and having longitudinal guide ribs, collar means at the other end of the beam and integral therewith adapted to encircle a reduced portion of the rock drill casing without engagement with the side rods and seating with its ends against certain of the casing parts, and means at the rear part of the beam to engage the rock drill to prevent relative rotary movement thereof.

- Y WILLIAM A. SMITH, SR. 

